Jan. 2, i93t> 



Meat Scraps versus Soybean Proteins 



395 



Table II. Ratio between average feed consumed and average gain in weight in Jj 

 periods of 14 days each — Continued 



BASAL RATION PLUS SOYBEAN MEAL 



BASAL RATIO PLUS COMDIMATION OF MEAT SCRAPS AND SOYBEAN MEAL 



BASAL RATIO ONI.Y 



13- 



365 9- 12 



33-29 



47-92 



1:1.44 



In this table the growth -promoting value of the protein is expressed 

 numerically as suggested by Osborne and Mendel.* The table shows also 

 that protein from meat scraps alone as a supplement to the basal ration 

 in any amount was not equal to that from soybeans or from the com- 

 bination of the two. Among the different lots (except the control lot 

 13) the average amount of feed consumed during the 13 periods of 14 

 days each did not vary greatly, ranging from 509 gm. for lot 2 to 

 631 gm. for lot 6. Hence it is quite important, from the standpoint of 

 economy in feeding, to combine the amount and kind of protein with the 

 basal ratio in the proportion which produces the best growth. In this 

 instance the best results were shown by lot 6, which received 10 parts of 

 protein from soybean meal. Next in order are lots 10, 11, and 12, which 

 received 10, 15, and 20 parts protein, equally from meat scraps and soy- 

 bean meal. Following these are the lots receiving protein from meat 

 scrap's. Plate 50 shows a cockerel and a pullet from lot 13, a cockerel 

 from lot 10, and a pullet from lot 6. 



1 Osborne, Thomas B., Mendel, Lafayette B., and Ferry. Edna L- a method of expressing nt7- 

 MERicALLY THE GROWTH-PROMOTING VAi<UB OF PROTBiNS. /ft Jour. BioL Chem., V. 37. no. a, p. 333-9*9. 

 1918. 



153425°— 20 5 



